. "Dianetics 55!"@en . "Dianetics 55! is a Dianetics/Scientology book published in 1954 by L. Ron Hubbard. In its preface, Hubbard explains that he considered the book to be the first true sequel to 1950's Dianetics: The Modern Science of Mental Health , even though numerous books on the subject had appeared in the intervening years."@en . "Dianetics 55! is a Dianetics/Scientology book published in 1954 by L. Ron Hubbard. In its preface, Hubbard explains that he considered the book to be the first true sequel to 1950's Dianetics: The Modern Science of Mental Health , even though numerous books on the subject had appeared in the intervening years."@en .